Evaporating apparatus



(No Model.)

T. GAUNT. BVAPORATING APPARATUS.

No. 447,817. l-Ztented Mar. 10,1891* UNITED STATES PATENT OFFICE.

THOMAS GAUNT, OF` BROOKLYN, NElV YORK.

EVAPORATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 447,817, dated March10, 1891.

Application led July 18, 1890.

To all wiz/om it may concern.'

'Be it known that I, THOMAS GAUNT, of Brooklyn, county of Kings, Stateof New York, have invented an Improvement in Evaporating Apparatus, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on thedrawings representinglike parts.

This invention relates to apparatus for the evaporation and distillationof liquids, and has for its object to provide apparatus, as will bedescribed, whereby the liquid being treated may be concentrated to anydesired speciiic gravity.

My invention in an evaporating apparatus therefore consists in thecombination, with an evaporator and a liquid-supply therefor, of anindependent auxiliary or mixing chamber connected to the saidliquid-supply and to the evaporator and interposed between them, a valveto control vthe liquor-supply, a iioat connected to the supply-valve andoperated by the level of the liquid in the mixing-chamber, and a pumpconnected to the said evaporator and to the mixing-chamber and a branchpipe connected to the discharge-pipe for the pump, substantially as willbe described.

Figure l is a diagram in elevation of an evaporating apparatus embodyingmy invention; Fig. 2, a detail, on an enlarged scale, of the auxiliarychamber shown in Fig. l; Fig. 3, a side elevation of the auxiliarychamber shown in Fig. 2, looking toward the right, the said chamberbeing broken out to show the mixer or distributer in the said chamber gand Fig. 4, a top or plan view of the auxiliary chamber shown in Fig. 2.

Referring to Fig. l, A represents an evaporatin g apparatus, which maybe of any usual or desired construction, it preferably being composed ofvertical rows of tubes, constituting an evaporating-surface, and aliquidfeeder located above the same, substantially as shown anddescribed in United States Patent No. 409,572, granted to me August 20,1889. The liquid-feeders referred to have connected to them branch pipesa, joined to a supply-pipe a', connected to the bottom of an auxiliarychamber or vessel as, preferably secured to the evaporator A in anysuitable manner, the said pipe being provided with a Serial No. 359,133.(No model.)

cock or valve a4, by which the supply of liquor to the liquid-feeders iscontrolled. The.

auxiliary chamber 0,3 is connected by a pipe d5 to a liquor-supply tanka6, the said pipe being provided with a cock or valve al, by which thesupply of liquor from the tank d into the vessel as may be positivelycontrolled by hand. The vessel a3 is provided with a liquor-inlet valve,having its stem b (see Fig. 2) connected by link b to a lever b2,pivoted, as at b3, to an upright b4, secured to or forming part of thevessel, the said lever being connected at one end, as by a link b5, toan air float or vessel h6, the said lioat being connected with the topand bottom of the vessel a3 by rigid pipes D7 hs and iiexible pipes b9Z910. The weight of the iioat h6 is counterbalanced, as herein shown, byaball or weight Z212, which is adjustable on the lever b2.

The evaporator A is connected, as bya pipe c, to a pump c', having itsoutlet-pipe c2 extended up and connected to the top of the vessel as,the said outlet-pipe, substantially near the pump c', having extendedfrom it a branch pipe c3, provided with a cock or valve c4, the saidbranch pipe preferably discharging into the tank or vessel c5.

The auxiliary chamber or Vessel a has'located within it a distributer,(shown as a perforated plate 06,) supported by lugs c7, ex tended fromthe side walls of thesaid vessel. (See Fig. 3.)

In the operation of my improved evapo-` the float o0 and its contentsoverbalances the.

weight Z112, turning the lever b2 on its pivot and closing theinlet-valve for the chamber. y

The cock a4 in the pipe d is then opened and vthe liquor in theauxiliary chamber is permitted to iiow through the pipe c and branchpipes d into the liquid-feeders above the evaporating-surface. As theliquor ows from the auxiliary chamber c3 its level in the Said chamberand in the iioat is lowered, and

IOO

the counterbalancing-weight Z212 overcomes the weight of the float h6and again opens the inlet-valve to the chamber a3, permitting more weakliquor to flow into the vessel or chamber a3. The liquor on its passagethrough the evaporator is concentrated and is drawn from the evaporatorby the pump c through the pipe c and is forced through the outletpipesc2 for the pump back into the auxiliary chamber as if the cock or valvec4 in the branch or discharge pipe c3 remains closed. Thepartially-concentrated liquor returned by the pump into the vessel a3falls upon the distributer and mixes with the Weak liquor from thesupply-tank a, so that the liquor below the mixing-plate in the Vessela3 is of a higher specific gravity than the weak liquor in the tank a6.The liquor returned into the vessel or chamber a3 helps to fill the sameuntil the iioat b overcomes the Weight Z912 and cuts oi the supply fromthe tank a6. The cock c4 remains closed until the liquor has attainedthe desired specific gravity, and when this has been effected the saidcock may be more or less opened to discharge a quantity of the liquid.The greater portion of the liquid, being returned to the vessel a3,further mixes with fresh Weak liquor from the tank a6. The supply ofweak liquor, it will be noticed, is

automatically controlled by the level of the liquor in the vessel a3,and therefore the said vessel may, and preferably in practice will, havea vent-opening for the escape of air or vapor in the vessel co3, thevapor preferably being conducted into the Weak-liquor tank a by a pipeh2o, or, if desired, the vessel a3 may be open at its top.

I claimln an evaporating apparatus, the combination, with an evaporatorand a liquid-supply therefor, of an independent auxiliary or mixingchamber connected to the said liquorsupply and to the evaporator andinterposed between them, a valve to control the liquorsupply, a floatconnected to the supply-valve and operated by the level of the liquid inthe mixing-chamber, and a pump connectedto the said evaporator and tothe mixing-chamber, and a branch pipe connected to the discharge-pipefor the pump, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOMAS GAUN T. lVitnesses:

JAS. H. CHURCHILL, EMMA J. BENNETT.

